diff --git a/machines/storage01/prometheus.nix b/machines/storage01/prometheus.nix
index 483d131..0e07478 100644
--- a/machines/storage01/prometheus.nix
+++ b/machines/storage01/prometheus.nix
@@ -38,7 +38,7 @@ in
 
     webExternalUrl = "https://${host}";
 
-    retentionTime = "6m";
+    retentionTime = "1y";
 
     extraFlags = [ "--storage.tsdb.retention.size=20GB" ];